de.erdesignerng.util.JasperUtils.java Source code

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Here is the source code for de.erdesignerng.util.JasperUtils.java

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/**
 * Mogwai ERDesigner. Copyright (C) 2002 The Mogwai Project.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA.
 */
package de.erdesignerng.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.data.JRXmlDataSource;
import net.sf.jasperreports.engine.design.JasperDesign;
import net.sf.jasperreports.engine.xml.JRXmlLoader;
import org.apache.commons.lang.StringUtils;

/**
 * Utility class to deal with jasper reports.
 */
public final class JasperUtils {

    private JasperUtils() {
    }

    private static void findReports(Map<File, String> aReportMap, File aDirectory) throws JRException {
        Thread.currentThread().setContextClassLoader(JasperUtils.class.getClassLoader());
        if (aDirectory != null && aDirectory.exists() && aDirectory.canRead()) {
            for (File theFile : aDirectory.listFiles()) {
                String theName = theFile.getName();
                if (theName.endsWith(".jrxml") && (!theName.contains("_"))) {
                    try {
                        JasperDesign theDesign = JRXmlLoader.load(new FileInputStream(theFile));
                        String theReportName = theDesign.getName();
                        if (StringUtils.isNotEmpty(theReportName)) {
                            aReportMap.put(theFile, theReportName);
                        }
                    } catch (FileNotFoundException e) {
                        // This cannot happen
                    }

                } else {
                    if ((theFile.isDirectory()) && (!".".equals(theName)) && (!"..".equals(theName))) {
                        findReports(aReportMap, theFile);
                    }
                }
            }
        }
    }

    public static Map<File, String> findReportsInDirectory(File aDirectory) throws JRException {
        Map<File, String> theResult = new HashMap<>();
        findReports(theResult, aDirectory);
        return theResult;
    }

    public static JasperPrint runJasperReport(File aModelXMLFile, File aJRXMLFile)
            throws JRException, FileNotFoundException {

        String theFileName = aJRXMLFile.getAbsolutePath();
        int p = theFileName.indexOf(".jrxml");
        String theTemplateName = theFileName.substring(0, p) + ".jasper";

        File theTemplateFile = new File(theTemplateName);

        JasperDesign theDesign = JRXmlLoader.load(new FileInputStream(aJRXMLFile));
        JRQuery theQuery = theDesign.getQuery();
        String theQueryText = null;

        if (theQuery != null) {
            theQueryText = theQuery.getText();
        }
        if (StringUtils.isEmpty(theQueryText)) {
            throw new RuntimeException("Cannot extract query from Jasper template");
        }

        Map<String, Object> theParams = new HashMap<>();
        theParams.put(JRParameter.REPORT_LOCALE, Locale.getDefault());

        String theSubreportDir = theTemplateFile.getParent();
        if (!theSubreportDir.endsWith(File.separator)) {
            theSubreportDir += File.separator;
        }
        theParams.put("SUBREPORT_DIR", theSubreportDir);

        JRXmlDataSource theDataSource = new JRXmlDataSource(aModelXMLFile, theQueryText);
        return JasperFillManager.fillReport(new FileInputStream(theTemplateFile), theParams, theDataSource);
    }
}